251045245 has 8 divisors (see below), whose sum is σ = 328641120. Its totient is φ = 182578320.

The previous prime is 251045231. The next prime is 251045251. The reversal of 251045245 is 542540152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251045245 - 2⁵ = 251045213 is a prime.

It is a super-2 number, since 2×251045245² = 126047430074220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2282175 + ... + 2282284.

It is an arithmetic number, because the mean of its divisors is an integer number (41080140).

Almost surely, 2^251045245 is an apocalyptic number.

It is an amenable number.

251045245 is a deficient number, since it is larger than the sum of its proper divisors (77595875).

251045245 is a wasteful number, since it uses less digits than its factorization.

251045245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564475.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 251045245 is about 15844.4073729502. The cubic root of 251045245 is about 630.8372550019.

Adding to 251045245 its reverse (542540152), we get a palindrome (793585397).

The spelling of 251045245 in words is "two hundred fifty-one million, forty-five thousand, two hundred forty-five".